Dental casting-machine.



herein set forth.

HARRY G. MAIZE, O1 PHILADELPHIA, PENNSYLVANIA.

DENTAL CAST No. 899,255. Specification of ING-MACHINE Letters Patent. Patented Sept. 22,. 1908.

7 Application filed February 19, 1908. Serial No. 416,679.

To all whom it may concern:

Be it known that I, IIARRY G. MAIZE, 'a' citizen of the United States, residing in the city and county of 'Philadelphia, State of Pennsylvania, have invented a new and useful Dental Casting-Machine, of which the following is a specification.

My invention relates to a new and novel form of casting machine for use in dental work in which the material may be cast, easily, simply and accurately, ,dispen sing with the usual complicated steps incident to the common swaging process.

It further consists in providing a machine which is adapted to cast metal under pres sure, andwhich may be used with many different sized flasks.

'For the purpose of illustrating my invention, I have shown in p the accompanying drawings a preferred embodiment thereof which has been found in practice to give satisfactory and reliable results, although it is to be understood that the various instrumentalities of which mv invention consists can be variously arranged and that my invention is not limited to the precise arrangement and organization of these instrum'entalities as It further consists of other novel features of construction all as will be hereinafter fully set forth.

Figure 1 represents a perspective view of-a machine embodying my invention. Fig. 2

, be suitably secured against movement.

the supporting represents aside elevation thereof partly insection. 3 represents a plan 0 the bed plate.

Similar numerals of reference indicate corres onding parts in the figures. eferring to the drawingsi 1 desi ates late of my machine, this uper face of which is preferably flat as at 2 and as apertures 3 for the reception of screws or other suitable means, by which the platemay In order to pro erly center different sizes of flasks upon t e su porti 7. plate 1 the surface is provided wit suita 1e marks, to indicate the location of such flasks relative to the upper press member to be hereinafter described. In the present instance a series of concentric pose. e

- 5 designates suitable spindles mounted on the plate 1 which are adapted to form guides .7

grooves 4 are formed for this pu I"--- forming sliding hearings to fit the spindles 5.

gral therewith is'a hand grip 8 and a head 9, the latter being provided with a recess 10 adapted to receive the stem 11 of a suitable receptacle 12 which may be firmly held in place by the set screw 13. This receptacle 12 is providedwith a bore 14 for the reception of a suitable material, referably of a plastic nature, and is of such size as to fit over a flask 15 positioned u on the plate 1 in the ath of movement of t e press frame 6.- In t e resent instance the flask 15 is of tubular s ape and is finished to rest flush with the surface of the supporting plate 1 and is rial 16, whereby .the flask'an'd material form a suitable casting mold. i

In the operation of-my device the flask is .filled with the molding material 16 and the pattern from which a casting is to be produced is placed in the center of the'material .in the'flask. A gate 17 is then formed leading from the outside of the flask to the pattern and a portion of the molding material is carefull removed, to form afunnel shaped recess 18 or the reception of the molten casting material. In thecasting'proccss thenextstep is to melt out the dpattern which is preferably made of wax an at the same time harden the investment in the flask. This step having been a'ccom lished the mold is ready for the material, w ich is then placed into the funnel shaped recess of the flask in the form of a metallic head or scraps of material as the intouse to reduce the material to a molten state. Since there are no air vents from the the receptacle 18 and when the rope! conditions have been reached, that is when the metal is roperly fused, the frame 6 is lowflask 15 and the lastic material within the receptacle comes mto contactwith the molthe material with which the receptacle I2 is filled has previously been mixed witha' sufficient amountof water tosaturate the same so thatwhen the frame 6 is lowered to b' this material into contact with the b82325 mass of metal the steam will be generated, The frame is now brought-down under considerable ressure and the fused metalibefor a press frame 6 having lugs 1 secu'redamL coming su ject to the steam pressure will be mold the metal will collect in the bottom of ered sot at the receptacle 12 surrounds the.

ten metal. Attention i's'called to the fact that Attached to the frame 6 and preferably inteadapted to receive, a suitable molding matecase may be and a blow pipe is then brought accurately forced into the mold, filling all portions thereof and giving an exact reproduction of the pattern. It will be noted that in the present instance I have shown but a single gate leading into themold and this is a preferred form for small castings but it will be understood that I' do not desire to be limited in this respect, as it will be necessary in larger work, to provide several gates leading to the mold in order that the molten material will properly flow into the openin formed by the pattern and fill the same.

It will beyseen that this casting under pressure is a very efficient and exact means of producing work for dental uses since it substantially eliminates all shaping of the parts after they have been inserted in the tooth of a patient thereby saving a large amount of time and attaining at once accurate castings for inserts and the like.

- Having thus described. my invention, What I claim as new and desire to secure by Letters Patent, is 1. In a device of the character described, a mold, a support therefor, a plurality of concentric grooves in said support whereby said mold is centered and a receptacle adapted to embrace saidmold to force material into said mold under pressure.

2. In-a device of the character described, a flask,-a mold in said flask, a support therefor, guides secured to said support, aframe adapted to slide on said guides, a receptacle on said frame adapted to inclose said flask and means in said receptacle to force material into said mold under pressure.

3. In a device of the character described, a flask, a mold in said flask, a support therefor, guides secured to said support, a frame adapted to slide on said ides, a head'on said frame a rece tacledetac ably secured to said head and a apted to inclose said flask, and

means in said receptacle to force a material under pressure into said mold when said frame is lowered.

4. In a device of the character described a base, concentric grooves in said base adapted to center different sized flasks, guide spindles secured to said base, a frame slidably mounted on saidspindles, a rece taclesecured to said frame adapted to inc ose a flask, and means in said rece tacle for forcing material into a mold formed in said flask.

5. In a device of the character-described, a 7 5 base having a plurality of concentric grooves for centering .diflerent sized flasks, guide spindles secured to said base, a frame slida ly mounted on said guide spindles, a handgripfor manual 0 eration thereof, a receptaa cle secured to sai frame adapted to inclose a flask, and means in said receptacle to force a materialinto a mold formed in said flask.

6 In a device of'the character described, a base having a plurality ofconcentric grooves therein for centering different sized flasks, guide spindles secured to said base, a frame slidably mounted on said guide spindles, a

head on said frame adapted to receive interchangeable receptacles, and means in said hub for forcin the material into a mold formed in said ask. w A

7. In a dental-casting machine, a flask, a mold in said flask, a su port therefor, a head member carried by sai support, a receptacle on said head adapted to inclose said flask,

and means in said receptacle to force a mate-1 rial into said mold under pressure.

8. In a dental casting machine, a flask, a receptacle adapted to receive means for forcing a material in the flask under ressure, said receptacle being adapted to inc ose said flask, and a movable carrier for said receptacle.

7, HARRY G. MAIZE. Witnesses:

.E. B. MORRIS,

ROBERT M. BARR. 

